If you take a look at the menus and reviews, I think you'll see that the target demographic for the Mickey BBQ is young children and their self sacrificing parents. I wouldn't recommend it for an adult group.
We've been to HDDR many times and have always enjoyed the show. It really does have something for all age groups. And the all you care to drink beer, wine and sangria doesn't hurt either. It is a funny, corny, family friendly, foot stompin show. The food is home style ribs, chicken, salad, beans, and corn.
The luau appeals to some folks. Having been to a couple of luaus in Hawaii and Tahiti, I found both the food and the performances lacking. But some people like it.